This calorie calculator is a great tool to help you reach your weight loss or weight gain goal within a realistic time frame and maintain it. It calculates the calories and macros you need to intake daily to reach your goal weight and displays the projected changes in your body's composition over time. The calculator is accurate for individuals 18 years and over who are not pregnant or breastfeeding. Show
Enter your age, sex, height, current weight, and goal weight. Click the Physical Activity field to find your physical activity level. Physical activity levels can range from 1.4 (little activity) to 2.3 (very active). The default is 1.4. If you are unsure of your physical activity level, start with the default - the worst-case scenario. Enter a time frame for your goal weight (start date and target date). The calculator will only produce results if it determines the required food energy intake to reach your goal weight by the target date is more than 1,000 calories per day. Otherwise, it will automatically modify your target date for a minimum daily intake of 1,200 calories for women and 1,500 for men. Nutrition therapists will tell you that, below those levels, you will not meet food group targets and nutrient recommendations. You can change your target date later to increase or decrease your required calorie intake. Consult a doctor for guidance and support if you consider consuming a diet of fewer than 1,000 kcal or 4,200 kJ per day. Body Dynamics of Weight ChangeYour body requires energy to power its essential functions to maintain life and perform physical work. Glucose (blood sugar) is the body's principal energy source from food. When your body gets more glucose than it needs for energy, the surplus first gets sent to the liver and muscles and stored as glycogen for later use. The liver and muscles have a limited storage capacity for glycogen, so once the glycogen stores are full, the excess glucose is converted to triglycerides and stored in fat cells. To lose weight, you need to consume fewer calories than your body burns, putting your body in an energy deficit state. In that state, your body will compensate for the difference by extracting the extra energy from its energy stores to meet its daily calorie needs, resulting in weight loss from the breakdown of fat and lean body mass tissues. A popular rule-of-thumb for weight loss says that to lose 1 pound of body weight a week, eat 500 fewer calories daily (3,500 fewer calories weekly). This rule dates back to when there was limited understanding of fundamental metabolic processes. It takes the simplistic view that the energy content of weight loss is 3,500 calories per pound because fat tissue contains approximately 3,500 calories per pound, so burning that equivalent number of calories will result in a 1-pound weight loss. Unfortunately, the body does not work that way. Eating 3,500 fewer calories does not mean your body automatically burns 3,500 calories worth of fat. The reality is that when you lose weight, you lose fat along with lean tissue in muscle - not just fat. Lean mass consists of everything that's not fat, including muscle, bones, organs, ligaments, tendons, other tissues, and water. The rule also ignores other body dynamics of weight loss, such as the reduction in basal metabolic rate and decreased energy cost of physical activity. Your total daily energy expenditure (TDEE) changes with weight loss. Consequently, followers of diet programs based on this simple rule-of-thumb usually fail to reach their weight loss goal in the long run. Calculation of Calorie RequirementsThis calculator uses the mathematical body model developed by Kevin Dennis Hall, Ph. D., and his team of researchers at the National Institute of Diabetes and Digestive Kidney Diseases of the National Institute of Health. It has been shown that his mathematical model can accurately determine an individual's energy requirements for weight management. It challenges the popular 3,500 calories per pound rule by accounting for the body dynamics discussed earlier, including body adaptations that oppose weight change and the weight change associated with changes to glycogen and extracellular fluid levels. Calculation of MacronutrientsThe calculator will calculate your macronutrients (carbs, protein, and fat) amounts in grams based on the required caloric intake to reach your goal weight with a balanced, low fat, low carbs, and high protein diet. According to the Food and Nutrition Board of the Institutes of Medicine (IOM) dietary guidelines, an acceptable macronutrient distribution range is 45%-65% of calories for carbohydrates, 10%-35% for protein, and 20%-35% for fat. The calculated amounts put each macro's percentage within the IOM acceptable range for the different diet types. Related Calculators:
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How many calories should I eat to lose weight goal date?A popular rule-of-thumb for weight loss says that to lose 1 pound of body weight a week, eat 500 fewer calories daily (3,500 fewer calories weekly). This rule dates back to when there was limited understanding of fundamental metabolic processes.
Is eating 1200 calories a day healthy?As a general rule, people need a minimum of 1,200 calories daily to stay healthy. People who have a strenuous fitness routine or perform many daily activities need more calories. If you have reduced your calorie intake below 1,200 calories a day, you could be hurting your body in addition to your weight-loss plans.
How long will it take to lose weight on 1200 calories a day?But the average weight loss that most people see on the 1200 calorie diet is about one to two pounds per week.”
What is Cico rule for weight loss?CICO is an acronym for “calories in, calories out.” It's not a specific diet. Rather, it's the concept that creating a calorie deficit — by consuming fewer calories than you burn on a daily basis — leads to weight loss, while eating more calories than you burn causes weight gain ( 2 ).
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Weight loss calorie calculator goal date
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